I'm embarrassed to ask this, as I have gotten somewhat familiar with Reaper....I thought
So I just completed a project, (4) midi virtual instrument tracks & (2) audio vocal tracks. I've been mixing/listening/saving & up to this point, the playback sound was fine. I'm using a Behringer UMC-22 audio interface with ASIO.
As I was adding a few final Fx to the master track, just about to render, when out of nowhere, there is no sound on playback. Evidently I clicked on "something" accidentally. When I imported a new track within the project (virtual instrument using midi digital piano), I do see the yellow levels as I play a few notes....NOT THE CASE when I attempt to play the recorded project. Whether collectively or if I solo a track, not getting any level movement. Also I have noticed a few tracks have upside down "!" followed by the letter "S"
***********EDIT************
No longer seeing the '!S'.... Nothing was soloed or muted, but I tried the right-click UnSolo all, and unfortunately no luck.
I've browsed the forum, the user guide, several YouTube videos but no luck. Any ideas?